21224234354 has 24 divisors (see below), whose sum is σ = 35032373040. Its totient is φ = 9616463208.

The previous prime is 21224234347. The next prime is 21224234359. The reversal of 21224234354 is 45343242212.

It is a self number, because there is not a number n which added to its sum of digits gives 21224234354.

It is not an unprimeable number, because it can be changed into a prime (21224234359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 507812 + ... + 548015.

It is an arithmetic number, because the mean of its divisors is an integer number (1459682210).

Almost surely, 2^21224234354 is an apocalyptic number.

21224234354 is a deficient number, since it is larger than the sum of its proper divisors (13808138686).

21224234354 is a wasteful number, since it uses less digits than its factorization.

21224234354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055894 (or 1055871 counting only the distinct ones).

The product of its digits is 46080, while the sum is 32.

Adding to 21224234354 its reverse (45343242212), we get a palindrome (66567476566).

The spelling of 21224234354 in words is "twenty-one billion, two hundred twenty-four million, two hundred thirty-four thousand, three hundred fifty-four".